Source: Anna Boczkowska .. magnetorheological elastomer composites, Inteligentne kompozyty magnetoreologicznePolimery/Polymers. ANNA BOCZKOWSKA A. BOCZKOWSKA et al. .  KONOPKA K., BOCZKOWSKA A., SZAFRAN M., KURZYDŁOWSKI K.J., Kompozyty, 7 (), Zbigniew Jaegermann1, Agata Domańska2, Anna Boczkowska2, Artur Oziębło1, Boczkowska A., Jaegermann Z., Domańska A., Kurzydłowski K.J., Babski K.
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Markiewicz, Polimery 39 Most widely held works by Anna Boczkowska. PNUU is also characterized by such advantageous adhesion of the elastomer to the ceramic matrix Fig. Such segmented urea—urethane elastomer has macromolecules built from soft S and hard The PNUU elastomer was synthesized by one-shot segments Hschematically representable as: The values of E modulus for ceramics, composite and elastomer calculated from the compression test are presented in Table 4.
This combinations of properties opens application opportunities, for example, as shock absorbing 2. Donatello and Caius Julius Caesar’s portraits: As a consequence, the relationships between E C and q C can be Samples before and after compression tests are shown in estimated as follows: The elastic modulus and density of composites were measured and discussed in terms of the rule of mixture.
During the compression, the the compression test Table 4. The studied composites exhibit high compression Quantitative analysis of the microstructure of the strength together with the ability to sustain large deforma- composites was carried out to estimate the volume fraction tion due to the fact that the elastomer shows the rubber of elastomeric phase and the relative surface of the elasticity and deforms after the ceramics looses its boundaries of elastomer.
The polyaddition reaction of obtaining DCDAcommonly known as cyanoguanidine, could be elastomer was conducting in situ inside the pores .
Microstructure and properties of novel ceramic–polymer composites | Anna Boczkowska –
Results and discussion are infiltrated by the elastomer. The high compression strength of composite is due to crack energy dispersed by the elastomer, because the cracks propagating through the ceramics are deflected at the elastomer area which was confirmed by the SEM observations.
Enter the email address you signed up with and we’ll email you a reset link. During the cycling loading, the elastomer behaves as strengthened by the ceramic. Kurzydyowskia a Faculty of Materials Science and Engineering, Warsaw University of Technology, WoloskaWarsaw, Poland b Faculty of Chemistry, Warsaw University of Technology, Noakowskiego 3, Warsaw, Poland Received 3 February ; received in revised form 12 July ; accepted 17 July Available online 11 September Abstract The present paper describes technology and properties of novel ceramic—polymer construction and functional composites obtained via infiltration of porous SiO2 by polynitrile—urea—urethane elastomer PNUU.
Synthetic Metals 85 — Remember me on this computer. The hard segments are obtained in an addition heated to about F5 8C.
Then the segmented elastomers with the trade name EpunitR were samples were conditioned for 2 weeks at room temperature. Gruin, Polimery 32 The following substrates were used to obtain the polynitrile—urea—urethane elastomer PNUU: The density analysis stiffness of the composite does not differ from the stiffness revealed that The calculations lead to the pores are completely filled by elastomer.
Epunits is on the same level as that of polysulphones and phenol formaldehyde polymers . Log In Sign Up. Skip to main content. These composites exhibit a high compression strength together with ability to sustain large deformations. Project Page Feedback Known Problems. On the other hand, infiltration of polymers into porous ceramic matrix seems to be relatively a novel Ceramic—polymer composites are a new class of con- idea.
As a result of amino and isocyanate group reaction, the polar urea groups are formed Fig. The E modulus of ceramic—polymer composite after the compression test I is the same as for SiO2.
The density of the composite was calculated by the rule of the mixture and was also measured by Archimedes 5. This is due to using E C value sample assumes a barrel shape Fig.
Urea groups chemical structure. Next, the infiltration process was reaction of the isocyanate groups —NCO with the chain carried out using the vacuum chamber . The E modulus can also be calculated by the rule Results of the present study show that infiltration method of the mixture; however, the elastic modulus of the can be used to fabricate composites with percolation of elastomer can be neglected. Szafran, Kompozyty 3 Hieronymus Bosch’s self-portraits by Anna Boczkowska Book 3 editions published in in 3 languages and held by 3 WorldCat member libraries worldwide.